How can the array_multisort function be used effectively in PHP to sort arrays in descending order?

To sort arrays in descending order using the array_multisort function in PHP, you can pass the SORT_DESC flag as the sorting order parameter for the columns you want to sort in descending order. This flag will sort the specified columns in descending order. 

$data = array(
    array('id' => 1, 'name' => 'John', 'age' => 25),
    array('id' => 2, 'name' => 'Jane', 'age' => 30),
    array('id' => 3, 'name' => 'Alex', 'age' => 20)
);

// Sort by age in descending order
array_multisort(array_column($data, 'age'), SORT_DESC, $data);

print_r($data);

Keywords

array_multisort PHP sorting descending order arrays

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